Berlin is back, resuming its place as a great European capital. We climb the Reichstag's new glass dome, sway at a modern-day cabaret, and pop a few chocolates in the now thriving eastern sector. Along with Germany's finest art, complicated Berlin also has hidden remnants of its fascist and communist past. In a city that's rebounding and rebuilding, we crane our necks at Europe's newest Times Square-Potsdamer Platz.